I'm pretty sure that all the t-bars out there, calmini's and AC's, etc, are all re-badged SAW bars.
I did say they were OK BTW.
The Calmini rear suspension I had first did not flex as well though. I replaced it for that reason.
It used a 2-leaf AAL which is not as flexible as a 3-leaf AAL. I compared them and the 3-leaf flexed better than the 2-leaf (That was with the calmini shackles). The 3-leaf AAL version rode better than the 2-leaf version as well.
The Calmini shackles were an honest 3" longer than stock. The initial AC ones were too, but length creep on the AC's meant that AC's ended up being a little longer after about a year. (The ones received didn't stretch, AC just started shipping gradually longer versions....)
A 2-piece shackle can flex more than one with a cross brace, and, can break more easily as well. Nobody breaks shackles A LOT, unless they are idiots or wheel especially hard on them, or have other issues typically related to suspension or clearance deficiencies.
That said, I have wheeled with and have seen them break, because some guys are idiots, etc...but they didn't break the cross braced ones (Yet at least).
I didn't care about the powder coat either, I rattle canned mine black still on the rig and called it a day....a few minutes to take care of it.
I finally replaced the conventional shackles altogether when I went to Revolvers, and, those are among my favorite mods, so much bang for the buck. The ultimate droop is matchable by a flexier leaf pack (Alcan, etc) with regular lift shackles, but the down force improvements and ride quality is far better.
When I put the Revolvers on, due to loads I had to carry, I combined my old calmini 2-pack with the Deaver 3-Pack, and interwove it with the OEM leaves to make one progressive pack...which worked great for some reason.
The Revolvers rode so smooth that on the road, I went about a year or so with no rear shocks on the mounts. OFF road, no damping on landings WAS a bit bouncy though...my wife said she got shaken baby syndrome from it....but ON the road, you'd never notice, it soaks up irregularities that well.
Its the main reason I recommend the Articulator Kit.